Air cleaner



May 1930. H. G. KAMRATH l,757,432

l AIR CLEANER Filed April 23, 1927 Patented ay` 6, 1930 it; STATESPATENT" `FFI HERBERT GEORGE KAMRATH, F FL-IIIT, IIITIGHIGAN, .ASSIGNORTO A C SPA-.RK PLUG COMPANY, OF FLINT, MICHIGAN, A. COMPANY OEMIGHIG-All am cLEAivnn Application tiled April 23,

This invention relates to air cleaners of the v type employed oninternal combustion enparticles are separated by centrifugal action. Thespecific cleaner illustrated was designed 10 tothat described 'andclaimed in' my gines to clean the air supplied to the cylinders. Thecleaner is o f the typein which dust for use upon motor-cycles and isconsequently marked by simplicity and economy in construction. lngeneral the cleaner is similar prior application Serial No. 53,341,filed August 29, 1925, now Patent No. 1,723,427 issued August 6, 1929.It is distinguished from that cleaner inthat a tangential dust outlet isprovided instead of an axial outlet so that dust is more eifectivelydischarged; in that a special clip is provided to render the cleanereasy of attachment to the engine; and in the inclusion of several other.features of improvement lwhich will be pointed out in the speciicationand covered by the appended claims.v In the drawings Figure A1 is a viewshowing my cleaner applied to a motor-cycle engine, the one illustratedbeing of the well known Harley Davidson make. iFigure 2 is a sectionalview through the cleaner. Figure 3 is a view taken on line 3,. 3 ofFigure 2. Figure 4 is a detailed perspective view of the securing clip.Figure 5 is a detail view of the dust outlet. In Figure 1, 6 indicatesthe motor-cycle engine,8 the carburetor and 10 a passage conducting fuelmixture to the engine cylinders 12. The carburetor 8 is provided with anintake conduit 14 and 16 indicates my improved cleaner mounted on the Yintake.

The cleaner consists of a cylindrical casing 18 having an open end 20and a closed'end 22. In the open end 20 is tted, stamping 24 formed toprovide a plurality of blades 26 arranged in an annular series about acentral dome 28. These blades may be of the con-` iiguration describedin my prior application 1927. Serial No. 186,083.

34 and nut 36, the bolt being secured at its other end to airstraightener 38 suitably anchored in the clean air discharge conduit 40extending into the open end of the cleaner by means of bolt 42 passingthrough aligning apertures in the conduit 40 and the straightener.

lTo secure the cleaner to the conduit 14 I have secured to the rear wall22 of the cleaner casing a clip 44 comprising anrannulus 46 surroundingthe conduit 40 and having rearwardly extending spring arms 48 extendingsubstantially parallel with the conduit. The outer ends of the clips areshownbent outwardly` as at 50 to facilitate assembly. The clip 44 issecured to the rear wall of the casing by rivets 52 although any otherform of securingv means such as welding may be substituted if desired.

The intake conduit 14 is provided with a terminal bead 15 and ifdesired, the spring arms 48 may be shaped to follow the contour of thebead and to rmly grip the latter,

The casing 18 is provided with a dust out-v let 54. This outlet isformed by cutting the metal of the casing along intersecting lines 56and 58 and bending the resulting tongue 60 outwardly as shown in Figure5.

The cleaner operates as follows:

The air upon striking the blades 26 is set whirling causing dustparticles to be thrown outwardly and when the whirling column reachesthe dust outlet 54 the particles'are discharged by virtue of theirmomentum. The column of air thus relieved of its dust content reversesits direction and then reverses a second time and, striking thestraightener 38, its line of flow is changed from spiral to rectilinearand theair now passes into the carburetor intake 14. The

baiile 54 prevents stray air currents from passing in through the dustoutlet, theportion 60 serving as a cowl.

The spring ngers 48 of the clip strap 16 and the cleaner is thusysecurelyI held in position free from rattling. Withy the design of clipshown the air cleaner casing is strengthened at the point of connectionwith the air outlet.

While I have shown and described the preferred form of my cleaner it isobvious that my invention is capable of a considerable amount ofmodification as indicated by the scope of thev appended claims.

I claim:

1. An air cleaner comprisinga cylindrical casing having an open end anda closed end, a member closing the open end ofthe cleaner and comprisinga central imperforate portion and an annular series of helical blades psurrounding the imperforate portion and adapted to impart a whirlingmotion to the entering air, an axial clean air outlet eXtend-' ing intothe casing through the closed end, and a relatively short aperture inthe side wall of the casing adjacent the closed en d and opening intothe atmosphere, and a shield for said aperture, andan air straightenerarranged in the casing adjacent'the outlet tube or removing the whirlfrom the out* going air. I

air cleaner comprising a casinghaving a cleanA air outlet adapted toregister with an intake conduit and a plurality. of resilient armsadapted to be secured to the 4casing and extending rearwardly therefromfor encircling and yieldingly gripping the conduit, and a clamping bandadapted to encircle the ends of the arms and clamp them to the conduit.

v. In testimony whereof I aflx my signature.

HERBERT GEORGE KAMRATHL 44 are` locked in engagement with condult 14 by'

